The graph below depicts a firm with market power. In the graph, MC represents the firm's marginal costs, ATC represents the average total costs, D represents demand, and MR represents marginal revenue. Price () Quantity/Units a. What will this profit-maximizing monopolist charge? b. How many units will it produce? c. What would be the socially optimal output quantity? d. Calculate the consumer surplus at the profit-maximizing price and output. e. Is this a natural monopoly? Explain. (5 points)